Conservatory Roof Insulation with Spray Cork
A breathable, lightweight cork thermal coating that reduces summer overheating, winter heat loss, condensation and rain noise — without the weight and bulk of solid insulation boards.
Too hot in summer. Too cold in winter.
Irish conservatories are notorious for their temperature swings — sweltering on a sunny afternoon, freezing by evening. Polycarbonate and glass roofs offer almost no thermal resistance, so heat pours in during the day and pours out at night.
Condensation forms on cold roof surfaces and glazing bars, leading to dripping, mould and staining. And the drumming of rain on a polycarbonate roof makes the space unusable during wet weather.
Solid insulation boards can help, but they add weight, reduce headroom and darken the roof — often turning a light, airy space into a low-ceilinged box.
A lightweight thermal layer that works with your conservatory
Year-Round Comfort
Keeps conservatories warm in winter and cooler in summer — usable all year round, not just on mild days.
Reduces Overheating
A thin cork thermal layer slows solar heat gain through polycarbonate and glass roofs on hot days.
Stops Condensation
Breathable cork raises the internal surface temperature above the dew point, eliminating dripping condensation.
Rain Noise Reduction
Cork naturally dampens the drumming noise of rain on polycarbonate and metal conservatory roofs.
Spray-applied to the roof framework
Cork thermal coating is spray-applied to the internal framework, upstands and solid sections of the conservatory roof. It conforms to every profile — glazing bars, ridges, valleys and junctions — leaving no cold bridges.
Because it is a thin film (4–8mm), it adds negligible weight and does not significantly reduce headroom or block natural light through the glazing.
The cork raises the internal surface temperature of the roof structure above the dew point, so condensation stops forming and dripping — even on cold mornings.
Common questions
Make your conservatory usable all year
Send us photos of your conservatory roof and we'll advise whether cork spray is the right solution — free, no obligation.